JPH02267112A - Organic complex clay mineral - Google Patents

Abstract

PURPOSE:To simply produce organic complex clay minerals of fine particles of shape close to sphere without using an organic solvent by spray-drying an aqueous gel comprising a phospholipid, clay minerals and water. CONSTITUTION:A mixture of a phospholipid (e.g. egg yolk or phospholipid extracted from vegetable oil), clay minerals (montmorillonite) and water is previously dispersed by a monomixer, etc., and made into an aqueous gel by high-temperature emulsification method. The concentration of clay minerals in the gel is <= about 10wt.%, the temperature of inlet air in spraying is about 150-300 deg.C and the aqueous gel is spray-dried to produce powder of organic complex clay minerals comprising about 25-99.5wt.% clay minerals and about 0.05-75wt.% phospholipid. Consequently, fine spherical powder uniformly containing the phospholipid is obtained and preferably used for a cosmetic having extreme smoothness, moistening and emollient effect.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an organic composite clay mineral obtained by spray-drying an aqueous gel consisting of a phospholipid, a clay mineral, and water. By this method, organic composite clay minerals in the form of fine particles with a shape close to spherical can be easily obtained without using an organic solvent, and these can be advantageously incorporated into cosmetics and the like in which the feeling of use is important. In particular, the particle size of the phospholipid aggregate in the aqueous gel is 1 μm.
When it is less than m, it is preferable because an organically modified clay mineral containing phospholipids uniformly and having an excellent effect of significantly increasing the stability of phospholipids can be obtained.

[Prior Art] When an organic composite clay mineral containing phospholipids is added to cosmetics, etc., the phospholipids can provide a moist feel and excellent emollient effect. When producing this, - Since the phospholipid in the shell is not soluble in water, a possible method is to dissolve it in an organic solvent such as chloroform, disperse clay minerals therein, and then distill off the organic solvent. .

However, with this method, distilling off the organic solvent is troublesome, costly, and has safety issues.
It is extremely difficult to mass produce.

The organic composite clay mineral obtained in this way maintains the shape and size of the original clay mineral, and when added to cosmetics etc., it does not necessarily give a satisfactory feel when used, such as a rough feeling. It is often difficult to

[Problems to be Solved by the Invention] As a result of extensive research to improve the shortcomings of the prior art, the present inventors have solved the problem by spray drying an aqueous clay mineral gel containing phospholipid aggregates. It has been discovered that an excellent organic composite powder can be obtained which eliminates the above-mentioned drawbacks.

In other words, this method can be easily produced in large quantities without using organic solvents, and the resulting organic composite clay mineral contains phospholipids uniformly and is spherical, making it extremely smooth and moist. The present invention was completed based on the discovery that the powder has an emollient effect.

[Means for Solving the Problems] That is, the present invention relates to an organic composite clay mineral obtained by spray-drying an aqueous gel consisting of a phospholipid, a clay mineral, and water.

The configuration of the present invention will be described below.

The clay mineral used in the present invention is a layered silicate mineral belonging to the genus smectite, and generally includes montmorillonite, beidellite, nontronite, sabonite, and hectorite, and these minerals may be natural or synthetic. good. Commercially available products include Kunipia, Smectone (all manufactured by Kunimine Industries), Veegum (Vanderbild), Laponite (Laborte), and Fluorotetrasilicon Mica (Topy Industries). In carrying out the present invention, one or more types of clay minerals are arbitrarily selected from among these clay minerals.

The phospholipid used in the present invention refers to a phospholipid-containing substance extracted from egg yolk or vegetable oil and purified in some cases, or a hydrogenated product thereof, or a synthetic glycerophospholipid ester and a mixture thereof. In the present invention, Preferably, if lecithin is hydrogenated to an iodine value of 10 or less, the lecithin itself will not be peroxidized.
A system with excellent stability without any change in color tone or odor can be obtained.

The organic composite clay mineral of the present invention is a powder containing the above clay mineral and phospholipid.

The content of clay minerals in the total amount of organic composite clay minerals is 25 to 9
9.5% by weight is preferred, more preferably 50-90%
．． 0% by weight, and the content of phospholipids in the total amount of organic composite clay mineral is preferably 0.05 to 75% by weight, more preferably 1 to 50% by weight OII'.

Examples of the method for producing the aqueous gel of the present invention include a method of mixing an aqueous dispersion of clay minerals and an aqueous dispersion of phospholipids, or a method of directly mixing clay minerals, phospholipids, and water. It will be done. At this time, the smaller the phospholipid aggregates are, the more uniformly they are included in the finally obtained organic composite powder, and the easier it is for this powder to have a neat spherical shape. As a method for obtaining such small phospholipid aggregates, it is preferable to use the following high-pressure emulsification method.

That is, this is a method in which an aqueous dispersion of phospholipids or a mixture of clay minerals, phospholipids, and water is treated with strong shearing force.

Here, the strong shearing force treatment includes emulsifiers that can apply a stronger shear than the homomixer normally used in the production of cosmetics, such as a Manton-Bourin, French press, and ultrasonic emulsifier. This treatment may be performed on the entire system, or in some cases, a portion may be treated and then diluted with water or other compounds such as polyhydric alcohols.

In the present invention, it is desirable to perform preliminary dispersion using a commonly used homomixer or the like before performing strong shearing force treatment.

That is, first, phospholipids are dispersed or dissolved in molecular form in an aqueous solvent. At this time, heating treatment or stirring treatment using a disper or homomixer may be performed. Further, at this time, a small amount of water may be added depending on the case.

Next, a preliminary dispersion liquid is obtained by adding the aqueous phase to the obtained aqueous solvent phase while stirring.

Examples of the aqueous solvent here include polyglycerols such as ethylene glycol, propylene glyconyl, 1,3-butylene glycol, dipropylene glycol, glycerin, diglycerin, triglycerin, and tetrabrecerin, glucose, maltose, and maltitol. , sucrose, fructose, xylitol, inositol, pentaerythritol, sorbitol, maltotriose,
Examples include V-analyzable sugar and V-analyzable sugar reduced alcohol.

The aqueous phase here includes, for example, water-soluble active substances such as B group vitamins, vitamin C and its derivatives, pantothenic acid and its derivatives, vitamins such as biotin, monosodium glutamate, arginine, aspartic acid,
Examples include buffering agents such as citric acid, tartaric acid, and lactic acid, chelating agents such as EDTA, ultraviolet absorbers such as sodium 2-hydroxy-4-methoxybenzophenone-5-sulfate, and aqueous solutions of one or more types of various dyes. .

These substances are incorporated into the organic composite powder after spray drying.

The width of the phospholipid aggregate obtained by such a strong shear treatment can be reduced to several micrometers or less. In order to uniformly include phospholipids in the finally obtained organic composite powder or to form a neat spherical shape, the particle size of the phospholipid aggregates is preferably 1 μm or less, more preferably 0.3 μm or less. It is.

The particle size of the phospholipid aggregate can be measured, for example, by a dynamic light scattering method (IIIAc ROYCO submixed particle size distribution &lI machine - Nycomp Model 270, etc.).

In addition, when performing spray drying, the concentration of clay mineral in the gel is preferably 10% by weight or less; if the concentration is higher than that, the viscosity of the gel becomes too high, making it difficult to feed the liquid through the spray nozzle during spray drying. This may cause clogging, etc. A particularly preferred concentration range is 1 to 10% by weight.

When preparing a gel, it is preferable to sufficiently stir the clay minerals, etc. so that they are sufficiently dispersed and swollen. If the dispersion and swelling are insufficient, the nozzle may become clogged during spray drying, and the resulting organic composite may become clogged. Clay minerals may become irregular, which is not preferable.

For the spray drying, a general spray drying method such as a disk type, a pressure nozzle type, or a two-fluid nozzle type can be applied.

In either case, the inlet air temperature during spraying is preferably in a temperature range where phospholipids and swelling clay minerals are thermally stable;
The temperature is about 0 to 300°C.

Further, the exhaust temperature can be determined by the flow rate of the spray from the nozzle, etc., but a temperature of about 100° C. is sufficient for a large amount.

The clay mineral thus obtained is a spherical powder having a structure in which primary particles of clay mineral aggregate, and the particle size is 2 to 2.
It is 20 μm. Furthermore, the more transparent the appearance of the gel prepared in advance and the higher the viscosity (for example, in the case of laponite), the more uniform and smooth the particle surface morphology becomes.

[Effects of the Invention] The organic composite clay mineral of phospholipid and clay mineral obtained by the method of the present invention is superior in terms of cost and safety because no organic solvent is used in its production. It can be produced in large quantities, and the resulting powder contains phospholipids uniformly and is finely spherical. Therefore, when this powder is blended into cosmetics, etc., the phospholipids give it a moist feel with an emollient effect, and the spherical fine particles give it a smooth feel, and it also significantly improves the stability of the phospholipids. can be raised.

[Example] Next, in order to further understand the present invention, the present invention will be described in more detail by giving examples. The present invention is not limited thereby. All compounding amounts are in weight%.

Example 1 ■Hydrogenated soybean lecithin 2.0■Medylparaben 0.1■Ion-exchanged water Residue (manufacturing method) Φ~■ was heated to 70°C, stirred with a homomixer, and then stirred with a Manton-Bourin at 6000 psi]0 The treatment was carried out twice to obtain a transparent aqueous liquid in which the particle size of phospholipid aggregates was 0.1 μm or less.

500 mσ of this lecithin dispersion was added to water IL, and 30 g of Laponite XLG was dispersed therein with stirring to prepare a gel. This gel was spray-dried using a disk-type spray dryer at a disc rotation speed of 20, an OOOrpm% inlet temperature of 180°C, and an exhaust temperature of 110°C.
38 g of spherical powder of 20 μm was obtained.

Example 2 A powder leaf amplifier containing the spherical composite clay mineral obtained in Example 1 was manufactured.

■Composite powder of Example 1 8.1■Talc 29.0■Mica 45.4■Iron oxide red 1.0■Iron oxide yellow
0.5 ■ Iron oxide black
0.5 ■Titanium oxide
5.0■Liquid paraffin
5.0 ■ Lanolin
5.0 [Phase] Ethylparaben
0.30 fragrance
0.2 (Manufacturing method) Each powder was placed in a Henschel mixer and stirred uniformly, then the remaining ingredients were added and mixed uniformly. The mixture was pulverized with an atomizer and molded into a medium plate to obtain a powder leaf amplifier.

Comparative Example 1 A powder leaf amplifier was produced in the same manner as in Example 2, using mica instead of the composite powder.

Comparative Example 2 Instead of the composite powder used in Example 2, 0.1 g of hydrogenated soybean lecithin, 28 N Laponite XLG, and 68 N methylparaben were mixed in the powder part, and Powder Leaf Andage 3 was produced in the same manner. .

Table 1 shows the usage test results of Example 1 and Comparative Examples 1.2 by 20 panelists. The evaluation was performed by sensory evaluation using the following 1-505 scale.

1...Bad 2...Slightly bad ３・・・・・・Normal 4...somewhat good 5...Good The results were expressed as average values as follows.

0...4.5-5.0 0...3.5-4.4 △...2.5-3.4 ×...1 .5~2.4 Table 1: Quality characteristics of powder foundation As is clear from the results in Table 1, when spherical clay minerals compounded with lecithin are used, lecithin provides a moist feel, and the composite powder has a spherical shape. Because of this, it is smooth to use, and lecithin alone has poor odor stability, but by combining lecithin in this way, the foundation has no odor problems.

Example 3 ΦHydrogenated soybean lecithin 2.50 Methylparaben 0.1■ Glycerin 10. OO ion-exchanged water residue (manufacturing method) After heating Φ to ■ to 70°C, the temperature of ■ was removed while stirring with a homomixer. Thereafter, ultrasonic irradiation was performed to obtain a transparent aqueous liquid in which the particle size of phospholipid aggregates was 0.1 μm or less.

Next, 30 g of Laponite XLG is dispersed in water 11 with stirring. Add 500 ml of the lecithin-containing aqueous solution prepared as described above to the resulting gel and stir roughly. Thereafter, spray drying was carried out in the same manner as in Example 1, and 2 to 20μ
42 g of spherical powder of m was obtained.

When this powder was blended into a powder foundation in the same manner as in Example 2, a foundation with excellent usability and odor stability was obtained.

Example 4 ■ Hydrogenated egg yolk lecithin 1.0 ■ Laponite XLG 3.0 ■ Ion-exchanged water Residue (manufacturing method) Φ ~ ■ was heated to 70°C, stirred with a homomixer, and then heated with a Manton-Bourin at 6000 psi for 10 The treatment was carried out twice to obtain a transparent aqueous liquid in which the particle size of phospholipid aggregates was 0.1 μm or less.

This liquid L L was spray-dried in the same manner as in Example 1, and
35 g of μm spherical powder was obtained.

(Manufacturing method) ■■ was added to ■, heated to 70°C, and thoroughly mixed using a homomixer. This mixture was heated to 70°C and cooled while stirring, and then heated to 60°C using a Manton Bowlin.
A fine lecithin dispersion was obtained by processing 10 times at 000 psi.

Next, 30 g of Laponite XLG was dispersed in water 11 while stirring. Add 50 ml of the lecithin dispersion prepared as described above to the resulting gel and stir roughly. Thereafter, spray drying was performed in the same manner as in Example 1 to obtain 35 g of spherical powder with a diameter of 2 to 20 μm.

Example 5 ■Hydrogenated soy lecithin ■Methylparaben ■Glycerin ■Ion exchange water 2.0 0.1 10.0 remainder Patent applicant: Shiseido Co., Ltd.

Claims (2)

[Claims] (1) Organic composite clay mineral obtained by spray drying an aqueous gel consisting of phospholipid, clay mineral, and water. (2) In an aqueous gel consisting of phospholipids, clay minerals, and water, the particle size of the phospholipid aggregates in the aqueous gel is 1
An organic composite clay mineral obtained by spray-drying an aqueous gel having a particle size of less than μm.